Most Monthly Precipitation in Ketchikan History

This is a list of the largest monthly precipitation totals ever recorded in Ketchikan, Alaska history from 1910–2024.

What Was the Wettest Month in Ketchikan History?

According to NOAA records, the most precipitation that Ketchikan, Alaska has ever received in a single month is 53.9 inches which occurred in November 1917.

Month to date though April 26, 2024: 4.4 inches

Ketchikan Most Rain in One Month

Rank	Precipitation	Month
1	53.9 inches	November 1917
2	43.0 inches	November 1969
3	42.4 inches	October 1974
4	38.7 inches	October 1986
5	35.6 inches	October 1960
6	35.2 inches	December 1930
7	34.8 inches	October 2010
8	34.6 inches	October 1961
9	34.3 inches	October 1944
10	34.2 inches	December 1925
11	33.9 inches	August 1920
12	32.5 inches	October 2007
13	31.7 inches	November 1987
14	31.5 inches	December 2006
15	31.5 inches	October 1958
16	31.3 inches	January 1962
17	31.2 inches	November 1923
18	31.2 inches	April 1949
19	31.1 inches	October 1964
20	31.0 inches	January 2015